McDougall furnace
noun
Mc·Dou·gall furnace
mə̇kˈdügəl-
: a roasting furnace consisting of a vertical cylindrical shaft containing several superposed hearths over which ore entering at the top is made to pass consecutively by mechanical rabbles rotating around a central shaft
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“McDougall furnace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/McDougall%20furnace. Accessed 30 Nov. 2024.
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